Private __added_Readonly colorReadonly idReadonly intersectionsPrivate neighboring_Private neighboring_Readonly neighborsAdds a stone string to our neighbor list. This should probably only be called by StoneStringBuilder.
Compute if this string is considered potential territory (if all of it's neighbors are the same color). NOTE: This does not perform any advanced logic to determine seki status or anything like that, this only looks to see if the string contains EMPTY locations and that all of the surrounding neighboring are the same color. This should probably only be called by StoneStringBuilder.
A StoneString instance represents a group of intersections that are connected to each other and are all the same color.